boxing means converting value type to reference type and unboxing means convert

boxing means converting value type to reference type and
unboxing means converting reference type to value type.why
we need boxing and unboxing?

Question Posted / murali

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boxing means converting value type to reference type and unboxing means converting reference type t..

Answer / uday

We use boxing and un-boxing when we assign a value to an
object and vice-versa.
Ex:

Int i=10;
Object o=i //this is boxing
int j=(int)o; //this is unboxing

When u say boxing, an object box is allocated and then the
value is copied to that box.
When u unbox, the value is copied out of the object box and
copied into storage location.

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boxing means converting value type to reference type and unboxing means converting reference type t..

Answer / madhu maaydi

some times super class ref is may not available to subclass objects at that time we may go for umboxing, data in the web application travers in the net throuw objects only but not through variables at that time we need to type cast it into equalent obecjt at this time we go for boxing and auto boximg....

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boxing means converting value type to reference type and unboxing means converting reference type t..

Answer / deepak

actually we need boxing and unboxing to keep more than one type of value type of variables in a common reference type of collection.. so that you can do the common operation in a loop or anywhere else.. by unboxing one by one.. also you can pass that collection to any method.. so you dont need to make many overloaded method for every type of value type..

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